CVE-2019-3971: Comodo Antivirus

Medium severity, CVSS 5.5. EPSS: 0.4% chance of exploitation in the next 30 days.

Comodo Antivirus versions up to 12.0.0.6810 are vulnerable to a local Denial of Service affecting CmdVirth.exe via its LPC port "cmdvrtLPCServerPort". A low privileged local process can connect to this port and send an LPC_DATAGRAM, which triggers an Access Violation due to hardcoded NULLs used for Source parameter in a memcpy operation that is called for this handler. This results in CmdVirth.exe and its child svchost.exe instances to terminate.

Affected products

• Comodo Antivirus: up to and including 12.0.0.6810

Published 2019-07-17. Last modified 2026-06-17.